/*
silverPDF is sponsored by Aleyant Systems (http://www.aleyant.com)

silverPDF is based on PdfSharp (http://www.pdfsharp.net) and iTextSharp (http://itextsharp.sourceforge.net)

Developers: Ai_boy (aka Oleksii Okhrymenko)

Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation
files (the "Software"), to deal in the Software without
restriction, including without limitation the rights to use,
copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following
conditions:

The above information and this permission notice shall be
included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR SPONSORS
BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.

*/
using System;
using System.Diagnostics;
//using System.Drawing;
using PdfSharp.Drawing;
using PdfSharp.Pdf;

namespace Graphics
{
    /// <summary>
    /// Shows how to draw graphical paths.
    /// </summary>
    public class Paths : Base
    {
        public void DrawPage(PdfPage page)
        {
            XGraphics gfx = XGraphics.FromPdfPage(page);

            DrawTitle(page, gfx, "Paths");

            DrawPathOpen(gfx, 1);
            DrawPathClosed(gfx, 2);
            DrawPathAlternateAndWinding(gfx, 3);
            DrawGlyphs(gfx, 5);
            DrawClipPath(gfx, 6);
        }

        /// <summary>
        /// Strokes an open path.
        /// </summary>
        void DrawPathOpen(XGraphics gfx, int number)
        {
            //BeginBox(gfx, number, "DrawPath (open)");

            XPen pen = new XPen(XColors.Navy, Math.PI);
            pen.DashStyle = XDashStyle.Dash;

            XGraphicsPath path = new XGraphicsPath();
            path.AddLine(10, 120, 50, 60);
            path.AddArc(50, 20, 110, 80, 180, 180);
            path.AddLine(160, 60, 220, 100);
            gfx.DrawPath(pen, path);

            //EndBox(gfx);
        }

        /// <summary>
        /// Strokes a closed path.
        /// </summary>
        void DrawPathClosed(XGraphics gfx, int number)
        {
            BeginBox(gfx, number, "DrawPath (closed)");

            XPen pen = new XPen(XColors.Navy, Math.PI);
            pen.DashStyle = XDashStyle.Dash;

            XGraphicsPath path = new XGraphicsPath();
            path.AddLine(10, 120, 50, 60);
            path.AddArc(50, 20, 110, 80, 180, 180);
            path.AddLine(160, 60, 220, 100);
            path.CloseFigure();
            gfx.DrawPath(pen, path);

            EndBox(gfx);
        }

        /// <summary>
        /// Draws an alternating and a winding path.
        /// </summary>
        void DrawPathAlternateAndWinding(XGraphics gfx, int number)
        {
            BeginBox(gfx, number, "DrawPath (alternate / winding)");

            XPen pen = new XPen(XColors.Navy, 2.5);

            // Alternate fill mode
            XGraphicsPath path = new XGraphicsPath();
            path.FillMode = XFillMode.Alternate;
            path.AddLine(10, 130, 10, 40);
            path.AddBeziers(new XPoint[]{new XPoint(10, 40), new XPoint(30, 0), new XPoint(40, 20), new XPoint(60, 40), 
                                   new XPoint(80, 60), new XPoint(100, 60), new XPoint(120, 40)});
            path.AddLine(120, 40, 120, 130);
            path.CloseFigure();
            path.AddEllipse(40, 80, 50, 40);
            gfx.DrawPath(pen, XBrushes.DarkOrange, path);

            // Winding fill mode
            path = new XGraphicsPath();
            path.FillMode = XFillMode.Winding;
            path.AddLine(130, 130, 130, 40);
            path.AddBeziers(new XPoint[]{new XPoint(130, 40), new XPoint(150, 0), new XPoint(160, 20), new XPoint(180, 40), 
                                   new XPoint(200, 60), new XPoint(220, 60), new XPoint(240, 40)});
            path.AddLine(240, 40, 240, 130);
            path.CloseFigure();
            path.AddEllipse(160, 80, 50, 40);
            gfx.DrawPath(pen, XBrushes.DarkOrange, path);

            EndBox(gfx);
        }

        /// <summary>
        /// Converts text to path.
        /// </summary>
        void DrawGlyphs(XGraphics gfx, int number)
        {
            BeginBox(gfx, number, "Draw Glyphs");

            XGraphicsPath path = new XGraphicsPath();
            path.AddString("Hello!", new XFontFamily("Times New Roman"), XFontStyle.BoldItalic, 100, new XRect(0, 0, 250, 140),
              XStringFormats.Center);

            gfx.DrawPath(new XPen(XColors.Purple, 2.3), XBrushes.DarkOrchid, path);

            EndBox(gfx);
        }

        /// <summary>
        /// Clips through path.
        /// </summary>
        void DrawClipPath(XGraphics gfx, int number)
        {
            BeginBox(gfx, number, "Clip through Path");

            XGraphicsPath path = new XGraphicsPath();
            path.AddString("Clip!", new XFontFamily("Verdana"), XFontStyle.Bold, 90, new XRect(0, 0, 250, 140),
              XStringFormats.Center);

            gfx.IntersectClip(path);

            // Draw a beam of dotted lines
            XPen pen = XPens.DarkRed.Clone();
            pen.DashStyle = XDashStyle.Dot;
            for (double r = 0; r <= 90; r += 0.5)
                gfx.DrawLine(pen, 0, 0, 250 * Math.Cos(r / 90 * Math.PI), 250 * Math.Sin(r / 90 * Math.PI));

            EndBox(gfx);
        }
    }
}
